extenshi.io
SECURITY REPORT · EXTENSHI SCAN

Readwise

Firefox extension·by Readwise
89
/ 100 SAFETY SCORE
EXCELLENT
Looks clean. No meaningful risks detected in this scan.

Automated analysis of publicly available code — not a professional security audit. It may produce false positives and does not prove an extension is unsafe or safe. Treat it as one signal among many. Disclaimer · Report an issue

How it ranks

Readwise's safety score vs every other extension we've scanned
Globally
88.78999999999999%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked across every extension we scan
In its category
78.78999999999999%of its category extensions carry more risk
This extension
Riskier ←→ Safer
Ranked within its category
Findings
15
median 38Lower is safer
Risky permissions
3
median 1Critical + high perms
Total permissions
10
median 4All declared perms
Critical findings
0
median 2Severity = Critical

Findings breakdown

Automated security signal · 15 distinct issues across 6 severities
15
distinct issues
detected

Permissions requested

3 risky permissions of 10 total
3 high-risk permissions require attention
This extension requests 10 permissions in total. 3 of them grant broad capabilities that are worth a careful look.
High
Access browser cookies

Can read and modify cookies, potentially accessing login sessions

High
View open tabs

Can see URLs and titles of all open tabs

High
Observe web requests(optional)

Can monitor all network requests made by the browser

Medium
Show notifications

Can display desktop notifications outside the browser

Medium
Store local data

Can save data locally in the browser for persistence

Medium
Add context menu items

Can add custom items to the right-click context menu

Low
Schedule tasks

Can schedule periodic background tasks

Info
*://read.amazon.com/*

No additional information available.

Info
*://*.readwise.io/*

No additional information available.

Info
*://*.readwise.io/twitter_start*

No additional information available.

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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
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